For Gem Enthusiasts

This table contains a selection of minerals gemologists may encounter as jewelry stones or gem specimens. The gems are sorted by their crystal…

Opal connoisseurs all have their favorite opal patterns. Learn how to identify the patterns of these beautiful gems with plenty of photo and video…

Measuring specific gravity helps gemologists identify gemstones. The following table lists the specific gravity values for a variety of gem…

Although not suitable for jewelry, apophyllite is a popular collector’s piece. Perhaps the whitest of all gems, cut, colorless specimens are…

Can you tell if gem rough is too expensive? Learn how to estimate rough gemstone value by considering your gem yield and the prices for your faceted…

A relative newcomer to the world of gemstones, ekanite is rare and usually quite radioactive. When cabbed, some ekanites can display a star stone…